soiltex土壤酸度试剂soiln.土地；土壤；污物，粪便v.弄污soil mechanism composition机械组成Soilless culture technology无土栽培技术soil microorganism quantity土壤微生物数量soil remnant film pollution土壤地膜污染soil moisture feature curve土壤水分特征曲线Soil secondary salinization次生盐渍化soil obsolute water content土壤绝对含水量soil organic carbon content土壤有机碳含量soil layer seismic response土层地震反应soil for planting vegetable蔬菜地